Lithotripsy Process
Before lithotripsy
Before undergoing lithotripsy, a series of steps are taken to ensure the patient is prepared for the procedure.
Firstly, the doctor or nurse will inform the patient about any special preparations they need to make. This could include fasting for a certain period before the procedure or adjusting the intake of certain medications.
The doctor will conduct a thorough examination of the patient and may order several tests, such as lab tests or imaging tests like CT or MRI. These tests help to determine the size, number, location, and composition of kidney stones.
The patient’s health history is also taken into account. This includes any past health problems, surgeries, and current medications. The patient needs to inform the doctor about any medicines they are taking, including prescription or over-the-counter medicines, as well as any herbal supplements. This is because certain medicines can increase the risk of bleeding during the procedure.
In some cases, the patient may be instructed to avoid certain medications, such as aspirin or aspirin-like compounds, for a period before the procedure. These medications can increase the risk of bleeding.
The patient will also receive information about what to expect during and after the procedure, including potential side effects and recovery time. They will be informed about the need for someone to accompany them home after the procedure, as they may be under the effects of anesthesia.
On the day of the procedure, the patient will receive an IV for the administration of fluids and medications. Anesthesia will be administered to ensure the patient does not feel pain during the procedure.
During lithotripsy
During lithotripsy, the patient is positioned on an X-ray fluoroscopy table in the anteroposterior (AP) projection and along a 30° anterior oblique (AO) projection. The procedure begins with the administration of anesthesia to ensure the patient does not feel pain during the procedure.
A lithotripter, located outside the patient’s body, is used to generate high-energy shock waves. These shock waves are focused on the renal stones to pulverize them into small fragments that can pass via the urinary tract. The number of shock waves needed for each patient varies, with a mean of 3200 pulses reported in one study.
In some cases, complementary therapies such as acupressure at the Qiu point are used to control pain and improve patient comfort during the procedure. Ten minutes before lithotripsy, the intervention group receives acupressure at the Qiu point, while the sham group receives touch at a neutral point. The primary outcomes are pain intensity measured by the Visual Analog Scale (VAS) and physiological indices such as blood pressure and heart rate at baseline, 1, 10, 20, 30, 40, and 50 min after the intervention.
Radiation dose received by patients during the procedure is also a concern. Thermoluminescent dosimeters (TLDs) are used for radiation dose measurements. Each TLD chip is taped on the back of the patient at the entrance surfaces of the X-ray beam to evaluate the entrance surface dose (ESD). The mean ESD in the postero-anterior (PA) and oblique X-ray beam entrance were obtained at 12.04 and 68.84 mGy, respectively.
After the procedure, the patient is monitored for any complications or side effects. The patient’s vital signs are checked regularly, and pain management is provided as needed.
After lithotripsy
After undergoing lithotripsy, the patient is closely monitored to ensure their well-being and recovery. The patient can usually move about almost immediately after the procedure. Many people can fully resume daily activities within one to two days.
The patient will be advised to drink plenty of water to help the stone fragments pass through the urinary system. The remaining particles of small stones will exit the body when the person urinates1. This process can take several days or weeks.
Pain management is an important aspect of post-lithotripsy care. The patient may experience discomfort or pain as the stone fragments pass through the urinary tract. In some cases, medications may be prescribed to manage this pain.
Patients are typically scheduled for follow-up appointments to monitor their recovery and to ensure that all stone fragments have been passed. Additional tests, such as imaging studies, may be performed to confirm the successful removal of the stones.
Risks of lithotripsy
Like most medical procedures, lithotripsy carries some risks, even when performed.
One of the primary risks associated with lithotripsy is internal bleeding. The high-energy shock waves used to break down kidney stones can potentially damage surrounding tissues and blood vessels, leading to bleeding. In some cases, this may require a blood transfusion.
Another risk is infection. Any medical procedure that involves the urinary tract can potentially introduce bacteria, leading to an infection. Antibiotics are often given before and after the procedure to minimize this risk.
Kidney damage is another potential risk of lithotripsy. If a stone fragment blocks the flow of urine out of the kidneys, it can lead to kidney damage. This is why patients need to drink plenty of water after the procedure to help pass the stone fragments.
While lithotripsy is a significant advancement in the treatment of kidney stones, it is not without risks. These include internal bleeding, infection, and kidney damage. The increasing prevalence of kidney stones and the associated risk factors highlight the importance of careful patient selection, meticulous procedure planning, and thorough post-procedure care to minimize these risks.